3-74
BOP HIPWR 091719
3. Enter
Wave Frequency
(Hz).
4. Click
Generate Wave Segment
button to add a segment (the information displayed in the
Voltage or Current dialog boxes). Repeat steps 1 through 3 above to add additional seg-
ments as desired.
5. When all the segments have been completed, enter the
Loop
number to specify how many
times the waveform will run. A 0 means the waveform will run continuously until the
Stop
Execution
button is clicked.
Execute the Waveform.
Click the
Execute Wave
button to run the waveform.
FIGURE 3-26. WAVEFORM DIALOG BOX
Clearing the Waveform.
Once a Waveform has been generated, the individual segments can
not be changed; the only option is to delete the waveform by pressing the
Clear
button to start
over. In addition, performing any of the following operations will also clear the waveform: chang-
ing overcurrent or overvoltage PROTECTION settings, unit RESET, changing LIMIT MODEL
settings and exiting the OPERATE INSTRUMENT page.
Stop the Waveform.
After repeating the waveform as specified by the
Loop
number the wave-
form stops automatically with the output on, and the voltage and current at the values specified
by the last segment. If the
Loop
number is 0, click the
Stop Execution
button to stop the list.
When
Stop Execution
is clicked, the output stays on with the voltage and current at the values
in effect prior to the stop command. If the
Execute Waveform
button is clicked again, the wave-
form restarts from the beginning. If the waveform is stopped by clicking the
CLEAR
button, the
output turns off and
Output
setpoints are reset to 0V, minimum current.
3.6
SCPI PROGRAMMING
SCPI (Standard Commands for Programmable Instruments) is a programming language con-
forming to the protocols and standards established by IEEE 488.2 (reference document
ANSI/IEEE Std 488.2, IEEE Standard Codes, Formats, Protocols, and Common Commands
). SCPI com-
mands are sent to the BOP Power Supply as ASCII output strings within the selected program-
ming language (PASCAL, BASIC, etc.) in accordance with the manufacturer’s requirements for
the particular GPIB controller card used.
Different programming languages (e.g., BASIC, C, PASCAL, etc.) have different ways of repre-
senting data that is to be put on the IEEE 488 bus. It is up to the programmer to determine how
to output the character sequence required for the programming language used. Address infor-
mation (GPIB address) must be included before the command sequence. (See PAR.3.5.3.2.1 to
establish the BOP Power Supply GPIB address.)
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